Uncaught exception thrown in session handler.

Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: SELECT 1 AS expression FROM {sessions} sessions WHERE sid = :db_condition_placeholder_0; Array ( [:db_condition_placeholder_0] => laapdZJIOciyvnnsBypNpvTGznrP4TibUH8KySGkqMc ) in Drupal\Core\Session\SessionHandler->write() (line 84 of /var/www/html/new_trainee/core/lib/Drupal/Core/Session/SessionHandler.php).

Drupal\Core\Session\SessionHandler->write('Ybo1odnakvg4DDd1O8j0aPetsE182OlneDZde3J7xho', '_symfony_flashes|a:1:{s:5:"error";a:2:{i:0;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3594:"<em class="placeholder">Warning</em>: PDOStatement::execute(): MySQL server has gone away in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}i:1;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3601:"<em class="placeholder">Warning</em>: PDOStatement::execute(): Error reading result set's header in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}}}_sf2_meta|a:3:{s:1:"u";i:1732483430;s:1:"c";i:1732483430;s:1:"l";s:7:"2000000";}') (Line: 89)
Drupal\Core\Session\WriteSafeSessionHandler->write('Ybo1odnakvg4DDd1O8j0aPetsE182OlneDZde3J7xho', '_symfony_flashes|a:1:{s:5:"error";a:2:{i:0;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3594:"<em class="placeholder">Warning</em>: PDOStatement::execute(): MySQL server has gone away in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}i:1;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3601:"<em class="placeholder">Warning</em>: PDOStatement::execute(): Error reading result set's header in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}}}_sf2_meta|a:3:{s:1:"u";i:1732483430;s:1:"c";i:1732483430;s:1:"l";s:7:"2000000";}') (Line: 67)
Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy->write('Ybo1odnakvg4DDd1O8j0aPetsE182OlneDZde3J7xho', '_symfony_flashes|a:1:{s:5:"error";a:2:{i:0;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3594:"<em class="placeholder">Warning</em>: PDOStatement::execute(): MySQL server has gone away in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}i:1;O:25:"Drupal\Core\Render\Markup":1:{s:9:"*string";s:3601:"<em class="placeholder">Warning</em>: PDOStatement::execute(): Error reading result set's header in <em class="placeholder">Drupal\Core\Database\Statement-&gt;execute()</em> (line <em class="placeholder">59</em> of <em class="placeholder">core/lib/Drupal/Core/Database/Statement.php</em>). Drupal\Core\Database\Statement-&gt;execute(Array, Array) (Line: 631)
Drupal\Core\Database\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids__0 ) ORDER BY cid&#039;, Array, Array) (Line: 358)
Drupal\Core\Database\Driver\mysql\Connection-&gt;query(&#039;SELECT cid, data, created, expire, serialized, tags, checksum FROM {cache_discovery} WHERE cid IN ( :cids[] ) ORDER BY cid&#039;, Array) (Line: 113)
Drupal\Core\Cache\DatabaseBackend-&gt;getMultiple(Array, ) (Line: 92)
Drupal\Core\Cache\DatabaseBackend-&gt;get(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 37)
Drupal\Core\Entity\EntityFieldManager-&gt;cacheGet(&#039;entity_bundle_field_definitions:node:page:en&#039;) (Line: 332)
Drupal\Core\Entity\EntityFieldManager-&gt;getFieldDefinitions(&#039;node&#039;, &#039;page&#039;) (Line: 359)
Drupal\search_api\Plugin\search_api\datasource\ContentEntity-&gt;getPropertyDefinitions() (Line: 832)
Drupal\search_api\Entity\Index-&gt;getPropertyDefinitions(&#039;entity:node&#039;) (Line: 603)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;getValuesToExtract(Array, &#039;entity:node/_object&#039;, Array) (Line: 468)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;traitPreRender(Array) (Line: 231)
Drupal\search_api\Plugin\views\field\SearchApiEntityField-&gt;preRender(Array) (Line: 1503)
Drupal\views\ViewExecutable-&gt;render() (Line: 183)
Drupal\views\Plugin\views\display\Page-&gt;execute() (Line: 1630)
Drupal\views\ViewExecutable-&gt;executeDisplay(&#039;page_1&#039;, Array) (Line: 77)
Drupal\views\Element\View::preRenderViewElement(Array)
call_user_func(Array, Array) (Line: 378)
Drupal\Core\Render\Renderer-&gt;doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer-&gt;render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;Drupal\Core\Render\MainContent\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer-&gt;renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber-&gt;onViewRenderArray(Object, &#039;kernel.view&#039;, Object)
call_user_func(Array, Object, &#039;kernel.view&#039;, Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher-&gt;dispatch(&#039;kernel.view&#039;, Object) (Line: 156)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
";}}}_sf2_meta|a:3:{s:1:"u";i:1732483430;s:1:"c";i:1732483430;s:1:"l";s:7:"2000000";}')
session_write_close() (Line: 244)
Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->save() (Line: 198)
Drupal\Core\Session\SessionManager->save() (Line: 196)
Symfony\Component\HttpFoundation\Session\Session->save() (Line: 60)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 693)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

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Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[HY000]: General error: 2006 MySQL server has gone away: CREATE TABLE {cache_config} ( `cid` VARCHAR(255) CHARACTER SET ascii BINARY NOT NULL DEFAULT '' COMMENT 'Primary Key: Unique cache ID.', `data` LONGBLOB NULL DEFAULT NULL COMMENT 'A collection of data to cache.', `expire` INT NOT NULL DEFAULT 0 COMMENT 'A Unix timestamp indicating when the cache entry should expire, or -1 for never.', `created` DECIMAL(14, 3) NOT NULL DEFAULT 0 COMMENT 'A timestamp with millisecond precision indicating when the cache entry was created.', `serialized` SMALLINT NOT NULL DEFAULT 0 COMMENT 'A flag to indicate whether content is serialized (1) or not (0).', `tags` LONGTEXT NULL DEFAULT NULL COMMENT 'Space-separated list of cache tags for this entry.', `checksum` VARCHAR(255) CHARACTER SET ascii COLLATE ascii_general_ci NOT NULL COMMENT 'The tag invalidation checksum when this entry was saved.', PRIMARY KEY (`cid`), INDEX `expire` (`expire`), INDEX `created` (`created`) ) ENGINE = InnoDB DEFAULT CHARACTER SET utf8mb4 COMMENT 'Storage for the cache API.'; Array ( ) in Drupal\Core\Config\CachedStorage->readMultiple() (line 105 of core/lib/Drupal/Core/Config/CachedStorage.php).

Drupal\Core\Config\CachedStorage->readMultiple(Array) (Line: 165)
Drupal\Core\Config\ConfigFactory->doLoadMultiple(Array, 1) (Line: 104)
Drupal\Core\Config\ConfigFactory->doGet('automated_cron.settings') (Line: 89)
Drupal\Core\Config\ConfigFactory->get('automated_cron.settings') (Line: 50)
Drupal\automated_cron\EventSubscriber\AutomatedCron->__construct(Object, Object, Object) (Line: 277)
Drupal\Component\DependencyInjection\Container->createService(Array, 'automated_cron.subscriber') (Line: 173)
Drupal\Component\DependencyInjection\Container->get('automated_cron.subscriber') (Line: 105)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.terminate', Object) (Line: 88)
Symfony\Component\HttpKernel\HttpKernel->terminate(Object, Object) (Line: 32)
Stack\StackedHttpKernel->terminate(Object, Object) (Line: 671)
Drupal\Core\DrupalKernel->terminate(Object, Object) (Line: 22)